A few years back Sonos was going to EoL and brick a huge humber of their "legacy" devices and that those devices would prevent new ones from getting updated. After backlash they reversed their decision and all devices remained functional: https://www.businessinsider.com/sonos-device-support-ceo-apo...
However, I wouldn't expect anything from Sonos at this point in time.
However, I wouldn't expect anything from Sonos at this point in time.